1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _UAPI_LINUX_TIME_H 3 #define _UAPI_LINUX_TIME_H 4 5 #include <linux/types.h> 6 7 8 #ifndef _STRUCT_TIMESPEC 9 #define _STRUCT_TIMESPEC 10 struct timespec { 11 __kernel_time_t tv_sec; /* seconds */ 12 long tv_nsec; /* nanoseconds */ 13 }; 14 #endif 15 16 struct timeval { 17 __kernel_time_t tv_sec; /* seconds */ 18 __kernel_suseconds_t tv_usec; /* microseconds */ 19 }; 20 21 struct timezone { 22 int tz_minuteswest; /* minutes west of Greenwich */ 23 int tz_dsttime; /* type of dst correction */ 24 }; 25 26 27 /* 28 * Names of the interval timers, and structure 29 * defining a timer setting: 30 */ 31 #define ITIMER_REAL 0 32 #define ITIMER_VIRTUAL 1 33 #define ITIMER_PROF 2 34 35 struct itimerspec { 36 struct timespec it_interval; /* timer period */ 37 struct timespec it_value; /* timer expiration */ 38 }; 39 40 struct itimerval { 41 struct timeval it_interval; /* timer interval */ 42 struct timeval it_value; /* current value */ 43 }; 44 45 #ifndef __kernel_timespec 46 struct __kernel_timespec { 47 __kernel_time64_t tv_sec; /* seconds */ 48 long long tv_nsec; /* nanoseconds */ 49 }; 50 #endif 51 52 #ifndef __kernel_itimerspec 53 struct __kernel_itimerspec { 54 struct __kernel_timespec it_interval; /* timer period */ 55 struct __kernel_timespec it_value; /* timer expiration */ 56 }; 57 #endif 58 59 /* 60 * legacy timeval structure, only embedded in structures that 61 * traditionally used 'timeval' to pass time intervals (not absolute 62 * times). Do not add new users. If user space fails to compile 63 * here, this is probably because it is not y2038 safe and needs to 64 * be changed to use another interface. 65 */ 66 struct __kernel_old_timeval { 67 __kernel_long_t tv_sec; 68 __kernel_long_t tv_usec; 69 }; 70 71 /* 72 * The IDs of the various system clocks (for POSIX.1b interval timers): 73 */ 74 #define CLOCK_REALTIME 0 75 #define CLOCK_MONOTONIC 1 76 #define CLOCK_PROCESS_CPUTIME_ID 2 77 #define CLOCK_THREAD_CPUTIME_ID 3 78 #define CLOCK_MONOTONIC_RAW 4 79 #define CLOCK_REALTIME_COARSE 5 80 #define CLOCK_MONOTONIC_COARSE 6 81 #define CLOCK_BOOTTIME 7 82 #define CLOCK_REALTIME_ALARM 8 83 #define CLOCK_BOOTTIME_ALARM 9 84 /* 85 * The driver implementing this got removed. The clock ID is kept as a 86 * place holder. Do not reuse! 87 */ 88 #define CLOCK_SGI_CYCLE 10 89 #define CLOCK_TAI 11 90 91 #define MAX_CLOCKS 16 92 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC) 93 #define CLOCKS_MONO CLOCK_MONOTONIC 94 95 /* 96 * The various flags for setting POSIX.1b interval timers: 97 */ 98 #define TIMER_ABSTIME 0x01 99 100 #endif /* _UAPI_LINUX_TIME_H */ 101
